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WHERE IS THE ECM LOCATED - 2002 Buick Century

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Passenger side behind dash , i've copied a schematic , hope fully it will load, also known as a PCM

2002 buick century ecm location Google Search

Posted on Apr 10, 2015


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Were is the ecm located?

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    When the term Electronic Control Module (ECM) is used in this guide it will refer to the engine control computer regardless that it may be a Vehicle Control Module (VCM), Powertrain Control Module (PCM) or Engine Control Module (ECM).
    The Electronic Control Module (ECM) is required to maintain the exhaust emissions at acceptable levels. The module is a small, solid state computer which receives signals from many sources and sensors; it uses these data to make judgments about operating conditions and then control output signals to the fuel and emission systems to match the current requirements.
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    See Figures 1 and 2

    0900c152800a7f96.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Fig. 1: ECM mounting scheme-except 1996 models

    0900c152800a7f97.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Fig. 2: ECM mounting scheme-1996 models
    The ECM is located in the passenger side footwell in the kick panel up to 1996. In 1996, the ECM is located in the engine compartment next to the battery.

    1. Disconnect the negative battery cable.
    2. Disengage the connectors from the ECM.
    3. Remove the spring retainer off and over the rail of the ECM on vehicles except 1996.
    4. Slide the ECM out of the bracket at an angle.
    5. Remove the ECM.

    To install:
    1. Install the ECM into the bracket.
    2. Install the spring retainer (except 1996) and plug in the electrical connectors.
    3. Connect the negative battery cable.

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    Where is the ECM located


    The ECM is mounted on the right side of the dash above where the passengers feet would be.
    The lower panel will need to be removed to see it.
    Here is the service manual procedure to remove it.
    1. Turn ignition to "OFF".
    2. Disconnect battery ground cable.
    3. Remove right hand hush panel.
    4. Disconnect connectors from the ECM
    5. Remove ECM mounting hardware.
    6. Remove ECM from the passenger compartment.
    7. Remove ECM access cover.
    8. Transfer PROM unit to replacement ECM. Using two fingers, push both retaining clips back away from the PROM. At the same time, grasp it at both ends and lift it up out of the socket. Do not remove the cover of the PROM. Use of unapproved PROM removal methods may cause damage to the PROM or socket.
    9. Remove new ECM from its packaging and check the service number to make sure it is the same as the defective ECM.
    10. Remove access cover.

    There you are. I hope your repair goes well.


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